Image coding apparatus, image coding method, and program

An image coding method comprising:

• acquiring a plurality of first values indicating an evaluation of each of a plurality of prediction modes which can be selected in coding of a chrominance component of a block to be coded and a plurality of second values indicating an evaluation of each of a plurality of modes which can be selected in coding of a luminance component of the block to be coded, and
• determining a luminance prediction mode to be used for the coding of the luminance component out of the plurality of luminance prediction modes, based on the acquired plurality of first values and the plurality of second values.

A non-transitory computer-readable storage medium storing a program for causing a computer to execute image coding, the program comprising:

• computer-executable instructions to acquire a plurality of first values indicating an evaluation of each of a plurality of chrominance prediction modes which can be selected in coding of a chrominance component of a block to be coded and a plurality of second values indicating an evaluation of each of a plurality of luminance prediction modes which can be selected in coding of a luminance component of the block to be coded, and
• computer-executable instructions to determine a luminance prediction mode to be used for the coding of the luminance component out of the plurality of luminance prediction modes, based on the plurality of first values and the plurality of second values acquired by the acquisition unit.